This book serves as a foundation to the field of HCI, equipping readers with the necessary knowledge and skills to engage with this field. It: · Discusses human functionalities and characteristics relevant to interaction, including sensory perception, attention and memory, language and communication, emotions, decision-making, as well as mental models, human error and human actions. · Explores the evolution of HCI design approaches and the role of social and organizational psychology in HCI. · Discusses key concepts and societal aspects of interactive technologies, such as user acceptance, ethics, privacy and trust. · Covers the historical background, contributing disciplines, essential concepts and theories within the domain. This book will appeal to individuals interested in human-computer interaction research and applications.